I'd recommend checking out Sportsbet.io depending on the type of bet you want to play.
I wouldn't recommend Sportsbet.io to the OP. Sportsbet doesn't allow players from the United States to gamble on their platform according to their
TOS.
"For various legal or commercial reasons, we do not permit accounts to be opened or used by customers resident in certain jurisdictions, including the United States of America (and her dependencies"...
Using a VPN could work, but why do that? They have the right to confiscate your money if you are consciously breaking their rules.